import logging
import logging.handlers
import os
import sys
from pathlib import Path

def setup_logging(log_level: str = "INFO", log_file: str = None):
    """Setup application logging configuration"""
    
    # Create logs directory if it doesn't exist
    log_dir = Path("logs")
    log_dir.mkdir(exist_ok=True)
    
    # Set log level
    numeric_level = getattr(logging, log_level.upper(), None)
    if not isinstance(numeric_level, int):
        raise ValueError(f'Invalid log level: {log_level}')
    
    # Create formatter
    formatter = logging.Formatter(
        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
    )
    
    # Setup root logger
    root_logger = logging.getLogger()
    root_logger.setLevel(numeric_level)
    
    # Clear existing handlers
    root_logger.handlers.clear()
    
    # Console handler
    console_handler = logging.StreamHandler(sys.stdout)
    console_handler.setLevel(numeric_level)
    console_handler.setFormatter(formatter)
    root_logger.addHandler(console_handler)
    
    # File handler
    if log_file:
        file_handler = logging.handlers.RotatingFileHandler(
            log_file,
            maxBytes=10*1024*1024,  # 10MB
            backupCount=5
        )
        file_handler.setLevel(numeric_level)
        file_handler.setFormatter(formatter)
        root_logger.addHandler(file_handler)
    
    # Error file handler
    error_handler = logging.handlers.RotatingFileHandler(
        log_dir / "error.log",
        maxBytes=10*1024*1024,  # 10MB
        backupCount=5
    )
    error_handler.setLevel(logging.ERROR)
    error_handler.setFormatter(formatter)
    root_logger.addHandler(error_handler)
    
    # Set specific logger levels for Hugging Face Spaces
    logging.getLogger("gradio").setLevel(logging.INFO)
    logging.getLogger("flask").setLevel(logging.INFO)
    logging.getLogger("werkzeug").setLevel(logging.WARNING)
    
    return root_logger

def get_logger(name: str):
    """Get a logger with the specified name"""
    return logging.getLogger(name)

# Setup logging based on environment
if __name__ != "__main__":
    log_level = os.getenv('LOG_LEVEL', 'INFO')
    log_file = os.getenv('LOG_FILE', 'logs/app.log')
    setup_logging(log_level, log_file)